Errors when trying to use Xalan instead of Saxon

Hello all,
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I was wondering if anyone knew of any differences between the Saxon 6.5.1 parser and the Xalan 2.4 parser.
I am currently working on a project that uses Saxon, but we are attempting to migrate to the Xalan parser.
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The project has been working fine with Saxon but as soon as we attempt to use Xalan instead we get a 
transform.TransformerConfigurationException. The exception is as follows:
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javax.xml.transform.TransformerConfigurationException: javax.xml.transform.TransformerConfigurationException: 
javax.xml.transform.TransformerException: java.lang.ArrayIndexOutOfBoundsException
at org.apache.xalan.processor.TransformerFactoryImpl.newTransformer(TransformerFactoryImpl.java:767)
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There are a couple errors that follow, including some suspicious looking error:
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Caused by: java.lang.ArrayIndexOutOfBoundsException
??????? at org.apache.xml.utils.BoolStack.peek(BoolStack.java:172)
??????? at org.apache.xalan.processor.StylesheetHandler.pushSpaceHandling(StylesheetHandler.java:1592)
??????? at org.apache.xalan.processor.StylesheetHandler.startElement(StylesheetHandler.java:650)
??????? at org.apache.xml.utils.TreeWalker.startNode(TreeWalker.java:346)
??????? at org.apache.xml.utils.TreeWalker.traverse(TreeWalker.java:167)
??????? at org.apache.xalan.processor.TransformerFactoryImpl.processFromNode(TransformerFactoryImpl.java:225)
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Here is the snippet where the build fails.? The line marked with the * is the exact line numer:
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Element root = transform.getDocumentElement();
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? if ( root.getTagName().equals("xsl:stylesheet") )
????? {
???????? *Transformer transformer = TransformerFactory.newInstance().newTransformer(new?? 
?????????????????????????????????????????????????????????????????????????????????? DOMSource(root/*transform*/));
???????? transformer.transform(new DOMSource(model), result);
????? } 
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The transform variable is of type org.w3c.dom.Document
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Any help would be greatly appreciated.
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Thanks in Advance 
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Jason Silva



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